Just got two new pairs of CMI Elbow top headers, installing them on my fresh , warmed over 502 MPIs. They came with no litterature, I'm wondering if there is a need to plumb water to the elbow top fitting as well as the individual runner inlets or can this simply be plugged with the provided pipe plugs? Thanx

depends on whether you are running a circulating pump or not.

You spend that kind of money and get no literature? That can't be right.
I'd call CMI to CYA!
DS

I've talked to CMI about this last year. With hoses going to the fittings you mention, what happens is that water flows to these fittings to provide cooling to the tailpipes and rubber hoses joining the pipes to the transom tips. The distribution manifold to the individual risers receives circulated "block" water. The intent is to allow the motor to warm up faster. Most apps (including my 502 MPI/Whipple with CMI E tops) just plug the ports with the plugs furnished.

Thanx Breathe Later, I was going to contact CMI, just never got around to it. Most applications I have seen on the net seem to plug the elbow fitting as you said. It makes sense that enough water flows to both the indivdual funners as well as the tail pipe to rubber hose as I am still using a engine recirc pump. By the way, like your pic, building the suit he's wearing is my real job in between trying to get this boat together by spring....

Here is a Picture of mine they run just fine.

Lester,

The HP 500 EFI engines are plumbed like the pic from ClassCig38. I've seen most though with the fittings plugged-including merc 900 sc engines. Does ILC or Hamilton Standard make the suits still? I'm a big Project Apollo fan (as well as Mercury and Gemini programs). \

Regards,

Mark

Ya, I work at Hamilton, we still make the suit although we need to fly soon or............who knows......hope for return to flight , these boat parts are expensive! Couldn't open the cigs pic.......I'm not a gold member

Lester,

PM me and I'll email the pics. That's cool that you work for Hamilton. I would have loved to work on anything related to the program as an engineer. We make equip for the packaging and printing/converting industry. My specialty is servo drives and touch screen control interfaces.

Regards,

Mark S.